"First Blood" examines some of America's most notorious serial killers through the prism of their first known kills to reveal what drove them to the moment when violent fantasy and curiosity became a devastating reality.

"First Blood" examines some of America's most notorious serial killers through the prism of their first known kills to reveal what drove them to the moment when violent fantasy and curiosity became a devastating reality. Giving a unique perspective on these psychologically complex killers, the series explores the pivotal moments in the killers' lives that led to them to committing these horrific crimes. From Richard Ramirez (The Night Stalker) Ed Kemper (The Co-Ed Killer) Robert Hansen (The Butcher Baker) Aileen Wuornos (Damsel of Death) and more, "First Blood" dives into the exact moment these criminals made their first move, analyzes their motivations, and explores the critical moments in their lives that brought them down these gruesome paths. With access to exclusive and never-before-seen interviews, insights from law enforcement and leading experts in profiling, criminology and psychology, conversations with survivors, new archives and more, viewers hear first-hand how the actions of these cold-blooded killers unfolded, leaving behind hundreds of innocent victims and their grieving families.—A&E Networks